Abstract
We describe 5 cases of a rare and often lethal arrhythmia: short-coupled variant of torsade de pointes. In the light of quitecharacteristic electrocardiograms and clinical picture of this arrhythmia, we consider the name 'short-coupled variant torsade de pointes' as more appropriate than, the more commonly applied term for such cases - 'idiopathic ventricular fibrillation'. We suggest that in patients with unexplained syncope, normal echocardiogram, normal QT interval and frequent premature ventricular contraction with short coupling this arrhythmogenic entity should be suspected. We stress that these premature beats are often misclassified as supraventricular since the two major factors (slow initial depolarisation of the working myocardium and structural abnormalities of the left ventricle) responsible for typical morphological features of ventricular beats are lacking.
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